自动生成
```<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
</body>
</html>
单行注释：[ctrl+k,ctrl+c] 或 ctrl+/
取消单行注释：[ctrl+k,ctrl+u] (按下ctrl不放，再按k + u)
多行注释：[alt+shift+A]
多行注释：/**